Annular valve for compressors, blowing-engines, and the like.



PATBNTED MAR. 10, 1908.

J; A, WILLAREDT. ANNULAR VALVE FOR OOMPRESSORS, BLOWING ENGINES, AND THE LIKE.

v APPLICATION FILED 001 12, 1907.

38HEBTS-SHEET 1.

v THE NORRIS PETERE co., wnsmlvcwu. D. c,

N'.881516. PATENTED MAR.10,1908. 0 J. A. WILLARBDT.

a SHEETS-SHEET 2.

ANNULAR VALVE FOR oommsssoas, BLOWING ENGINES, AND'THE LIKE.-

. APPLIOATION FILED 0OT. 12, 1907.

PATENTED MAR, 1 0, 1 908.

l'A. WILLAREDT. ANNULA-R VALVE FOR OOMPRESSORS, BLOWING ENGINES, AND THE LIKE.

3 SHEETS-SHEET 3 JEAN ALFRED WILLAREDT, OF BRUSSELS, BELGIUM.

ANNULAR VALVE FOR GOMPRESSORS, BLOWING-ENGINES, AND TI-IE LIKE.

Specification of Letters Patent.

Patented March 10, 1908.

Application filed October 12, 1907. Serial No. 397,145.

To all whom it may concern:

Be it known that I, JEAN ALFRED WILLA- REDT, civil engineer, citizen of Switzerland, residing at 12 Avenue Du Midi, Brussels, Belgium, have invented certain new and useful Improvements in Annular Valves for Compressors, Blowing- Engines, and the Like; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

For the proper working of compressors,

' blowing engines and the like, the construction of the valves is of greatest importance.

.The operation of the valves is only free from a longitudinal section and Fig. 2 a plan of one form of in-take and outlet valve constructed according to the invention, and Figs. 3 and 4 are like views respectively of a modification.

a is the seat for the intake valve and b that for the outlet valve. The two valve seats have annular passages and are mounted on a s indle c by means of which the valves are flied in the valve chamber. The annular passages through the valve seats a and b are closed by valve rings 6. which are turned upwardly at their outer edges e. The valves areloaded by two blade springs f crossing each other at right angles or a single starshaped blade spring. Screw nuts 9 hold the sprlngs or springin position. The spring or springs form a good guide for the ring 01, and for this purpose the ends of the spring are curved and lie against the inner face of the turned up edge e of the ring. A stoplate It threaded on the spindle c and held by t e nut. g. limits the stroke of the valve by limiting the curvature of the springs, and this plate is curved to correspond with the curvature assumed by the sprlngs when the valve lifts, thus aiding the guiding action of the springs.

The tension of the loading springs can be I varied by exchanging for others the washers i between the springs and the valve seating. Thus the valve can be used for different pressures of blast. The turned up edge of the ring d is also advantageous in that pieces do not get knocked out of the edge of the ring, which could otherwise easily happen as a result of the rapidly repeated blows of the ring upon its seat. To the same end the inner edge of the ring d may be bent upwards. A special advantage of the new valve over the known valves having no guides, is that it is suitable both for vertical and horizontal positions.

In the modification shown in Figs. 3 and 4 the edge of the ring (1 is not turned up all round the ring but only at three places e.

I The three-armed spring engages in recesses in the turned up portions. The stop-plate is in this case between the valve ring and the spring.

It will be observed that the valve plate has no other guides than is afforded by the ends of the radial springs so that when the valve is open the plate practically floats, being free to move toward and away from its seat without any appreciable sliding action on the ends of the sprlngs. In orderto normallylpress the valve plate against its seat and also to center it, it will be observed that the free ends of the springs must not only impinge against a part of the plate facing inwardly toward the stem but must also press against an upwardly-facing part of the plate. It will be observed also that by making the plate separate from the springs the plate may be made of sufficient thickness and weight and diameter to withstand the severe hammering valves of this type are subjected to in use, while on the other hand the springs may be more readily given the proper strength and tension and may also be separately removed would they break.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. In a valve, the combination of a central stem or rod, an annular seat thereon, an annular plate on saidseat having at its outer annular edge inwardly and upwardly facing parts, a series of radial springs fastened to the stem and having their outer ends shaped to fit against said inwardly and upwardly facing parts of the valve plate, to center the plate and also to normally hold it against its 1 seat, a circular stop on the stem to limit the seat. 7 1 upward movement of the springs and the 2. In a valve, the combination of a central plate, and means for removably clamping the stem or rod, an annular seat thereon, an anstop and the springs in place on the stem.

nular plate on said seat having at its outer l In testimony whereof I hereunto allix my annular edge inwardly and upwardly facing l signature in the presence of two witnesses.

parts, a series of radial springs fastened to JELX AI FRED 711 I APFDT the stern and having their outer ends shaped J J J to fit against said inwardly and upwardly itnesses:

facing parts of the valve plate, to center-the GREGORY PIIELAN,

plate and also to normally hold it against its PAUL MAFTY. 

